note 52124 added to language.types.array

Beware that if you're using strings as indices in the $_POST array, that periods are transformed into underscores: <html> <body> <?php printf("POST: "); print_r($_POST); printf("<br/>"); ?> <form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>"> <input type="hidden" name="Windows3.1" value="Sux"> <input type="submit" value="Click" /> </form> </body> </html> Once you click on the button, the page displays the following: POST: Array ( [Windows3_1] => Sux ) ---- Manual Page -- http://www.php.net/manual/en/language.types.array.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+52124 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+52124&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+52124&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+52124&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+52124&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+52124&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+52124&report=yes Search -- http://master.php.net/manage/user-notes.php